CN108192928A - Prepare ROSA26 gene mutations and the method rich in unrighted acid animal - Google Patents

Abstract

The invention discloses ROSA26 gene mutations are prepared and the method rich in unrighted acid animal.The method of mutation ROSA26 genes disclosed by the invention is carried out using CRISPR/Cas9 systems, and CRISPR/Cas9 systems include the sgRNA of targeting ROSA26 genes, and the target sequence of sgRNA is the nucleotide sequence of sequence 2 in sequence table；Donor dna of this method by importing sgRNA and Cas9 into recipient cell and containing Sfat1 expression casettes realizes the mutation of ROSA26 genes.It is demonstrated experimentally that the method using the present invention can be with successful knockout ROSA26 genes, and site-directed integration Sfat1 genes finally successfully obtain the animal of expression Sfat1.

Description

Prepare ROSA26 gene mutations and the method rich in unrighted acid animal

Technical field

The present invention relates to ROSA26 gene mutations in biotechnology, are prepared and the side rich in unrighted acid animal Method.

Background technology

Polyunsaturated fatty acid (PUFAs) is a kind of aliphatic acid for being widely studied and paying close attention to.PUFAs mainly includes ω -6 With ω -3PUFAs two types, each type all includes multiple from short carbon chain (18C) to Long carbon chain (22C) and contains more The aliphatic acid of a unsaturated bond.More and more researchs have shown that PUFAs has extensive biological function, they participate in cell The composition of film and as the signaling molecule during many cell responses, is closely related with a variety of diseases of the mankind, Suitable content is of crucial importance for the normal development of the mankind and other mammals and holding good condition of health.ω- 6PUFAs on the whole for have little significance to human body, excessive intake is detrimental to health instead.ω -3PUFAs by Confirm the important role in terms of a variety of diseases such as prevention and treatment angiocardiopathy, arthritis, cancer.Wherein it is particularly 22 The EPA of the DHA of six alkene of carbon and 20 light dydrocarbon alkene have important positive effect to health.

The hot spot and direction that ω -3PUFAs are current high-quality pig breedings are produced in pork by transgenic technology. Omega-3-aliphatic acid desaturase gene be ω -3PUFAs synthesis key gene, they using ω -6PUFAs for substrate in fat Sour carbochain methyl end third carbon catalysis generates a unsaturated bond (ethylene linkage) and synthesizes corresponding ω -3PUFAs.In recent years, respectively The scientist of state has cloned multiple omega-3-aliphatic acid desaturase genes, but wherein most gene can only synthesize the ω of 18 carbon- 3PUFAs, value of exploiting and utilizing are little.Although ω -3PUFAs the genes of more long-chain, such as fungi can be synthesized by also having been reported that The omega-3-aliphatic acid desaturase of Saprolegnia diclina can synthesize the ω -3PUFAs of 20 carbon, another fungi The 1S-4 of Mortierella alpina is not only able to the ω -3PUFAs of 20 carbon of synthesis, moreover it is possible to synthesize the ω -3PUFAs of 18 carbon. The gene for being really used for such research comes from the omega-3-aliphatic acid desaturase gene (Fat1) of nematode C.elegans. The gene is transferred into the content increase that can make in mammalian cell and mouse from the ω -3PUFAs of 18 carbon to 22 carbon, display It is out very big can value of exploiting and utilizing.Come from the omega-3-aliphatic acid desaturase gene Sfat1 of nematode C.briggasae (similar to Fat1), can get through the approach that ω -6 is converted to omega-3 polyunsaturated fatty acids, the random integration of preparation Sfat1 transgene clone pigs, the content of omega-fatty acid are improved largely, 20 carbon in Sfat1 transgene pig musculatures EPA accounts for about the 16% of total fatty acid content, and the DHA of 22 carbon accounts for about the 4% of total fatty acid content.It is transferred to gene constructed turn of Sfat1 Gene cloning pig is to prepare the effective means rich in omega-3 polyunsaturated fatty acids transgene pig.

Pig embryos stem cell, which is not yet successfully built, so far is, the pig induction prepared using induced multi-potent stem cell technology is more Energy stem cell is fitted into ability without system genitale, prepares genetic modification pig and depends on somatic cell gene modification and body cell Nuclear transfer technology.At present, the genetic modification of body cell mainly has two kinds of host gene site-directed integration and foreign gene radom insertion Method.Target gene is integrated into host genome using conventional carrier, transposon vector or viral vectors, integration process Belong to random process, target gene is incorporated into position in host genome and copy number is uncontrollable.It is main using random transgenosis It has the following problems：(1) exogenous origin gene integrator host genome position is uncontrollable, it is possible to host gene be damaged, especially It is using when transposon vector and viral vectors its be more biased towards in being integrated into host transcription active region；(2) foreign gene is in place Copy number in key-gene group is not known, and the genetically modified animal obtained genotype in succeeding generations is inconsistent；(3) external source The random integration of gene causes its differential expression and individual phenotype between each tissue of host and individual to differ；(4) external source The radom insertion of gene is easily methylated especially with its foreign gene promoter during viral vectors, causes foreign gene Silence.These shortcomings seriously constrain the cultivation and application of genetic modification pig.

CRISPR/Cas9 originates from a kind of efficient bacterial immune defense mechanism, is many bacteriums and most of Archimycetes Natural immune system, the identification of specificity is carried out by the virus to invasion and nucleic acid, is cut using Cas9 albumen, from And reach the protection to itself.CRISPR/Cas9 gene editing technologies based on this system development, can be conveniently and efficiently real Now the fixed point of genome is sheared, realizes the quick editor to target gene.Caused by efficiently solving conventional transgenic modification Problems provide effective approach to prepare the model that exogenous gene expression is stable, phenotype is consistent, gene are pushed to repair significantly Adorn the research and application of big animal model.During gene site-directed modification, need for some foreign genes, such as exogenous merit base Because provide one it is safe and reliable berth at " harbour ", these " harbour " foreign genes not only can stability and high efficiency expression, but also to cell With tissue without known side effect.Transgenic mice research shows that：ROSA26 gene locis are in each period of development, almost All cells can efficient mediate foreign gene expression, and the vigor of the depletion on cell of ROSA26 genes and function are not It has an impact.

CRISPR/Cas9 systems are that a kind of defense mechanism of exotic invasive microorganism is resisted in bacterium and archeobacteria, afterwards quilt Gene editing system is transformed into, with TALEN (transcription activator-like effector nuclease) And ZFN (zinc-finger nuclease) technology becomes three big genome edit tools side by side.CRISPR-Cas9 systems by Three parts element form, Cas9 endonucleases, crRNA and tracrRNA, crRNA can specific recognition section of DNA sequence, TracrRNA plays a part of to connect crRNA and Cas9 endonucleases, and Cas9 endonucleases draw crRNA-tracrRNA's Lower adjustable point cutting DNA is led, DNA double chain is caused to be broken, cell starts self-regeneration mechanism, is carried out by non-end with linking sources It repairs, and generates frameshift mutation (be inserted into or missing) and cause the forfeiture of gene function, realize the purpose of gene knockout. CrRNA and tracrRNA can also be by " repackings " into a guide RNA (single-guide RNA, sgRNA), this sgRNA It is enough Cas9 endonucleases is helped to carry out DNA fixed point cutting, realizes gene knockout.

Invention content

The object of the present invention is to provide the methods for being rich in unrighted acid animal for being mutated ROSA26 genes with preparation.

Present invention firstly provides the method for mutation ROSA26 genes, the method is carried out using CRISPR/Cas9 systems, The CRISPR/Cas9 systems include the sgRNA of targeting ROSA26 genes, and the target sequence of the sgRNA is following A1), A2) or A3)：

A1) in sequence table sequence 2 nucleotide sequence；

A2 the DNA sequence dna) and A1) limited have 75% or more than 75% homogeneity as A1) derived from DNA sequence dna；

A3) under strict conditions with A1) limit DNA sequence dna hybridize as A1) derived from DNA sequence dna.

The method may also include and the sgRNA and Cas9 is imported into recipient cell, realize the mutation of ROSA26 genes.

In the above method, the sgRNA and the Cas9 of being imported into recipient cell will be by that will contain the volume of the sgRNA The expression vector of the expression vector of code gene and the encoding gene containing Cas9, which is imported in the recipient cell, to be realized.

In the above method, the expression vector of the encoding gene containing the sgRNA and the coding containing Cas9 The expression vector of gene can be same carrier, which is named as carrier 1, the carrier 1 be by BsmB I to The recombinant vector that DNA fragmentation in CRISPR/Cas9 carriers shown in insetion sequence 2 obtains, the carrier 1 can express claim SgRNA and Cas9 described in 1.

The method may also include and donor dna is imported into the recipient cell, realize the mutation of ROSA26 genes, described Donor dna contains two DNA fragmentations for being located at the target sequence upstream and downstream in ROSA26 genes.

In the above method, expression cassette of the donor dna also containing Sfat1 encoding genes or Sfat1 encoding genes.

The sequence of the Sfat1 can be the protein shown in sequence table SEQ ID NO.10.

The Sfat1 encoding genes concretely DNA in sequence table shown in 2744-3943 of SEQ ID NO.9 Molecule.

The expression cassette is concretely 1400-4442 of SEQ ID NO.9 in sequence table.

The donor dna can also contain neo genes.In one embodiment of the invention, the donor dna is sequence table DNA fragmentation shown in middle SEQ ID NO.9, wherein, the 1-8 identification sequences for Not I of SEQ ID NO.9,9-998 Position for left homology arm sequence, 998-1003 be Hpa I identification sequence, the 1400-2641 sequences for CAG promoters Row, the 2744-3943 gene orders for Sfat1, the 4030-4442 sequences for rabbit β-globulin polyA, the The 4504-4538 sequences for loxP, 4564-5070 are PGK promoter sequences, and 5081-5884 are neo gene sequences Row, 6375-6408 be loxP sequence, 6414-6419 for Sal I identify sequence, 6420-7970 be the right side together Source arm sequence, 7987-7970 are the identification sequence of Not I.

Any one of the present invention also provides following 1) -6)：

1) method for preparing ROSA26 Genetic Mutant Cells, including：ROSA26 genes are prepared using the method to dash forward The cell of change；

2) method for preparing ROSA26 gene mutant animals, including：ROSA26 gene mutations are prepared using the method Zooblast prepares ROSA26 gene mutant animals using the zooblast of the ROSA26 gene mutations；

3) method for preparing expression Sfat1 cells, including：The animal that ROSA26 gene mutations are prepared using the method is thin Born of the same parents obtain the cell of expression Sfat1；

4) method for preparing expression Sfat1 animals, including：The animal that ROSA26 gene mutations are prepared using the method is thin Born of the same parents obtain the cell of expression Sfat1；The animal of expression Sfat1 is prepared using the cell of the expression Sfat1；

5) method rich in unrighted acid cell is prepared, including：ROSA26 gene mutations are prepared using the method Zooblast, obtain the cell rich in unrighted acid；

6) method rich in unrighted acid animal is prepared, including：ROSA26 gene mutations are prepared using the method Zooblast, obtain expression Sfat1 cell；It is prepared using the cell of the expression Sfat1 rich in unrighted acid Animal.

In the above method, the cell can be following a1) or a2) or a3)：

A1) zooblast；

A2) mammalian cell；

A3) pig cell；

The animal can be b1) or b2)：

B1) mammal；

A2) pig.

The present invention also provides application of the method in animal breeding.

In above application, the animal can be b1) or b2)：

B1) mammal；

A2) pig.

In the present invention, the pig cell can be pig fibroblast, such as porcine fetus fibroblasts.

It is demonstrated experimentally that the method using the present invention can be with successful knockout ROSA26 genes, and site-directed integration Sfat1 genes, The final animal for successfully obtaining expression Sfat1.The present invention organically combines transgenic breeding technology and traditional breeding method, is to add The important means and effective way of the high-quality transgene pig rearing new variety of speed, will greatly speed up pig Germplasm enhancement and new varieties The speed and efficiency of cultivation.

Description of the drawings

Fig. 1 is the Cas9 shear efficiencies that uciferase activity method measures different sgRNA.Wherein, sgRNA1-8 is represented respectively The reaction system of CRISPR/Cas9-sgRNA1-8 is transfected, Control represents the positive control that kit provides.

Fig. 2 is the Cas9 shear efficiencies that Surveyor enzyme cutting methods measure different sgRNA.Wherein, Marker represents DNA molecular Amount standard, Control1 and Control2 represent two control sgRNA that kit provides respectively, and sgRNA2,3,6 and 8 are distinguished Represent the reaction system of transfection CRISPR/Cas9-sgRNA2,3,6 and 8.

Fig. 3 is the structure diagram of pLoxP-Sfat1.

Fig. 4 is to carry out digestion qualification result to pLoxP-Sfat1 using different restriction enzymes.Wherein, Matker For DNA molecular amount standard.

Fig. 5 is ROSA26 sites site-directed integration Sfat1 genes schematic diagram and single cell clone qualification figure.Wherein, LA is a left side Homology arm, PA are rabbit β-globulin polyA, and RA is right homology arm；Cre⁺It represents to handle by Cre adenovirus, Cre^-It represents It is handled without Cre adenovirus；M is DNA molecular amount standard, the stripe size in each electrophoretogram from top to bottom is followed successively by 4500, 3000th, 2000,1200,800,500 and 200bp.

Fig. 6 is the qualification figure that ROSA26 sites site-directed integration turns Sfat1 gene pigs.

Specific embodiment

The present invention is further described in detail With reference to embodiment, the embodiment provided is only for explaining The bright present invention, the range being not intended to be limiting of the invention.Experimental method in following embodiments unless otherwise specified, is Conventional method.Material, reagent, instrument etc., are commercially available unless otherwise specified used in following embodiments. Quantitative test in following embodiment, is respectively provided with three repeated experiments, and results are averaged.

In following embodiments, unless otherwise specified, the 1st of each nucleotide sequence is the 5 ' of corresponding DNA in sequence table Terminal nucleotide, last position are the 3 ' terminal nucleotides of corresponding DNA.

2000 transfection reagents of Lipofectamine, INVITROGEN companies, REF.11668-030, LOT.1828123；

DEME culture mediums, GIBCO companies, REF.C11995500CP, LOT.8116413.

Embodiment 1 knocks out ROSA26 genes using CRISPR/Cas9 technologies

First, the target sequence of the sgRNA of design targeting ROSA26 genes

According to the porcine ROSA 26 gene order that GenBank is announced, design in CRISPR/Cas9 technologies and target ROSA26 genes Eight sgRNA (being denoted as sgRNA1-8) target DNA sequence, the target DNA sequence such as table 1 of eight sgRNA.

The target DNA sequence of 1 sgRNA of table

2nd, the CRISPR/Cas9-sgRNA carriers of structure targeting ROSA26 genes

It is held respectively in the positive sequence 5 ' of the target DNA of eight sgRNA of step 1 and adds in CACC joint sequences, in reverse mutual The end of complementary series 5 ' adds in AAAC joint sequences, synthesizes the forward and reverse complementary series of the target DNA of sgRNA, and sequence is shown in Table 2.

By every sequence ddH₂O is dissolved to 100 μM, takes the 15 μ l of two sequences solution of the target DNA of each sgRNA respectively Mixing is placed in 95 DEG C of denaturation 5min, is then at the uniform velocity cooled to 16 DEG C with the speed of 0.2 DEG C/s, obtains the target DNA of eight sgRNA.

Table 2 sets up the oligonucleotide sequence of each sgRNA target DNAs of CRISPR/Cas9-sgRNA carriers

With the BsmB I digestion CRISPR/Cas9 carriers of NEB companies (hundred Olympic Competition figure Genetic Biotechnologies Co., Ltds Carrier in UCA CRISPR/Cas9 rapid builds and activity detection kit) (digestion system is 30 μ l, wherein containing CRISPR/ 2 μ g, BsmB I restriction endonucleases of Cas9 carriers, 2 μ l, 1 × NEB Buffer 3.1), 55 DEG C of incubation 2h use 1% after incubation Ago-Gel detects digestion as a result, recycling carrier framework large fragment using DNA gel QIAquick Gel Extraction Kit, and NanoDrop measures it Target DNA of the carrier framework large fragment respectively with each sgRNA is connect using T4DNA ligases in 20 μ g/ μ l by concentration, will To the CRISPR/Cas9-sgRNA carriers that correctly recombinate of sequence be respectively designated as CRISPR/Cas9-sgRNA1, CRISPR/ Cas9-sgRNA2、CRISPR/Cas9-sgRNA3、CRISPR/Cas9-sgRNA4、CRISPR/Cas9-sgRNA5、CRISPR/ Cas9-sgRNA6, CRISPR/Cas9-sgRNA7 and CRISPR/Cas9-sgRNA8, this eight recombinant vectors contain respectively The target DNA of sgRNA1-8, difference can express the sgRNA and Cas9 for targeting this eight target DNAs.

3rd, the preparation of porcine fetus fibroblasts

The selection gestation sow of 35 days, laparotomy ventrotomy take out embryo, are put into containing being washed 3 times in dual anti-D-PBS, are washed till nothing Color.By in the embryo transfer washed to another plate, head, four limbs and tail are cut with sterile scissors, removes internal organ, continues to use D- PBS buffer solution is washed for several times, is washed till colourless, is partially placed into remaining in the plate of 100mm, is then cut embryo with scissors 2~3mm fritters are cut into, fragment is transferred in 50ml centrifuge tubes.Add in the 0.25% of half centrifugation pipe volume Trypsin-0.04%EDTA digestive juices, room temperature digest 15~20min or so, centre piping and druming 5 times.Add in isometric terminate liquid The DMEM culture solutions of 10% fetal calf serum, and gently blow and beat.800rpm/min centrifuges 5min, abandons supernatant, then adds in 5ml's DMEM culture solutions containing 20% fetal calf serum gently blow and beat suspension cell again, carry out cell count.With 2 × 10⁵A cell/ The concentration of ml is inoculated in T25 Tissue Culture Flasks, and a full nutrient solution is replaced per 48h, will when cell growth to 80% is converged Cell cryopreservation or secondary culture are to get to porcine fetus fibroblasts.

4th, uciferase activity method measures the shear efficiency of the Cas9 of different sgRNA

Recovery porcine fetus fibroblasts, using the DMEM medium cultures containing 10%FBS, next day treats that cell reaches After 90% degree of converging, culture supernatant is abandoned, PBS cleaning cells are primary, extract cell genomic dna afterwards, use primer pair 1 The porcine ROSA 26 base of (CCTGAAGGACGAGACTAGCTCTAC and TCTGACCGTAAGGATGCAAGTGAG) amplification sgRNA targetings It is sequenced because of segment, and to obtained PCR product, the Rosa26 gene orders that gained sequencing sequence and Genbank are announced It compares, the target DNA sequence for detecting sgRNA whether there is mutation in the porcine fetus fibroblasts, as a result shows the pig fetus into fibre The target DNA of sgRNA1-8 in cell is tieed up without mutation.

293T cells (ATCC) (cell culture medium used is the DEME culture mediums containing 10%FBS) are passed on to 96 orifice plates (10000 cells/well), secondary daily lipofection transfect above-mentioned 8 CRISPR/Cas9-sgRNA carriers and precut PUCA (LUC)-ROSA26-1 carriers (the UCA CRISPR/Cas9 rapid builds of hundred Olympic Competition figure Genetic Biotechnologies Co., Ltds And carrier in activity detection kit), wherein contain 2000 transfection reagents of Lipofectamine, 2 μ l in each rotaring redyeing system, 0.8 μ g of CRISPR/Cas9-sgRNA carriers (a kind of CRISPR/Cas9-sgRNA carriers in each rotaring redyeing system), precut 0.2 μ g of pUCA (LUC)-ROSA26-1 carriers.Fresh culture is replaced after transfection 6h, continues culture for 24 hours, is drawn in 50 μ l cultures Clearly in 96 orifice plate of White-opalescent, according to the Renilla Luciferase Assay operational manuals configuration of Promega companies LUC reaction solutions (the Renilla of 100X Renilla Luciferase the Assay Substrate and 1ml of 10 μ l Luciferase Assay Buffer are mixed to get), 50 μ l of LUC reaction solutions are added in every hole, are examined immediately using 96 hole light-emitting appearances Luciferase signals are surveyed, calculate average value.And compared with Control groups, the activity of various sgRNA is analyzed.Wherein, Control groups are the positive control that kit provides.

The results show that each group CRISPR/Cas9-sgRNA's is respectively provided with preferable cleavage activity, wherein CRISPR/Cas9- The shear efficiency of sgRNA1,2,3,4,6 and 8 is more notable (Fig. 1).

5th, target site amplification PCR sequencing PCR measures the activity of sgRNA

Porcine fetus fibroblasts (cell culture medium used be the DEME culture mediums containing 10%FBS) are passed on to 24 orifice plates, Secondary daily lipofection transfects above-mentioned 8 CRISPR/Cas9-sgRNA carriers, and (wherein, each rotaring redyeing system contains 2000 transfection reagents of Lipofectamine, 2 μ l, CRISPR-Cas9-sgRNA carrier, 1 μ g, each system contain one kind CRISPR-Cas9-sgRNA carriers), cell genomic dna is extracted in transfection after 72 hours, and utilizes primer pair 1 (CCTGAAGGACGAGACTAGCTCTAC and TCTGACCGTAAGGATGCAAGTGAG) carries out the target sequence region of each sgRNA PCR amplification and sequencing, analyze each sgRNA target sequences catastrophe.Sequencing situation is shown in Table 3.

The cutting efficiency of each sgRNA guiding Cas9 cutting target dnas of 3 sequencing analysis of table

The results show that in the system of each sgRNA guiding Cas9 cutting target dnas, in the system containing sgRNA6,1 and 2 The editorial efficiency highest of DNA has been more than 50%, in remaining system, DNA in the system containing sgRNA7,5 and 4,8 and 3 Editorial efficiency reduces successively.

6th, Surveyor enzyme cutting methods measure the Cas9 shear efficiencies of different sgRNA

Used kit is SURVEYOR MUTATION DETECTION KIT, TRANSGENOMIC companies, CAT.706020, LOT.130421.

Porcine fetus fibroblasts (cell culture medium used be the DEME culture mediums containing 10%FBS) are passed on to 24 orifice plates, Secondary daily lipofection transfects above-mentioned CRISPR/Cas9-sgRNA carriers, and (wherein, each rotaring redyeing system contains 2000 transfection reagents of Lipofectamine, 2 μ l, CRISPR/Cas9-sgRNA carrier, 1 μ g, each system contain one kind CRISPR-Cas9-sgRNA carriers), cell genomic dna is extracted in transfection after 72 hours, and utilizes primer pair 1 (CCTGAAGGACGAGACTAGCTCTAC and TCTGACCGTAAGGATGCAAGTGAG) carries out the target sequence region of each sgRNA PCR amplification carries out Surveyor digestions, 3% gel electrophoresis analysis digestion result to each PCR product.

The results show that two electrophoretic bands in the system of transfection CRISPR/Cas9-sgRNA2 after digestion are most bright, show Efficiency highest during sgRNA2 guiding Cas9 cutting target dnas, can utilize sgRNA2 guiding Cas9 to realize ROSA26 genes Editor.Partial results are shown in Fig. 2.

Embodiment 2 turns Sfat1 gene pigs using the structure ROSA26 site-directed integrations of target sequence 2 of embodiment 1

First, the structure of recombinant vector

1st, the structure of pCRISPR/Cas9-ROSA-sg2 carriers

Synthesis upstream and downstream oligonucleotides 5 '-CACCGCTCCTTCTCGATTATGGGCGGG-3 ' and 5 '- AAACCCCGCCCATAATCGAGAAGGAGC-3 ' uses ddH₂O is dissolved to 100 μM, takes 15 μ of upstream and downstream complementary series solution respectively L is mixed, and is placed in 95 DEG C of denaturation 5min, is then at the uniform velocity cooled to 16 DEG C with the speed of 0.2 DEG C/s, the target DNA for obtaining sgRNA2 is double Chain oligonucleotides.With BsmB I digestion CRISPR/Cas9 carriers (the hundred Olympic Competition figure Genetic Biotechnologies Co., Ltds of NEB companies UCA CRISPR/Cas9 rapid builds and activity detection kit in carrier), by obtained carrier framework and the target of sgRNA2 DNA double chain oligonucleotides is connected, and the correct recombinant vector of obtained sequence is named as pCRISPR/Cas9-ROSA-sg2 (i.e. CRISPR/Cas9-sgRNA2 in embodiment 1), pCRISPR/Cas9-ROSA-sg2 can express target sequence in targeting embodiment 1 2 sgRNA2 and Cas9.

2nd, the structure of donor template vector (pLoxP-Sfat1)

By pEasy-Sfat1 carriers (Zhou Y, Lin Y, Wu X, Feng C, Long C, Xiong F, Wang N, Pan D,Chen H.The high-level accumulation of n-3polyunsaturated fatty acids in transgenic pigs harboring the n-3fatty acid desaturase gene from Caenorhabditis briggsae.Transgenic Res.2014,23 (1):EcoR I and Sac I identifications 89-97.) DNA fragmentation between sequence replaces with the DNA fragmentation between EcoR I and Sac I the identification sequences of pCAGGS carriers, obtains pCAGGS- Sfat1 carriers.End is glued into Hind III and Sal the I digestions of pCAGGS-Sfat1 carriers and filling-in, obtained comprising CAG The Sfat1 of promoter and rabbit β-globulin polyA express frame.By pLoxP-neo carriers (Zhou Y, Lin Y, Wu X,Feng C,Long C,Xiong F,Wang N,Pan D,Chen H.The high-level accumulation of n- 3polyunsaturated fatty acids in transgenic pigs harboring the n-3fatty acid Desaturase gene from Caenorhabditis briggsae.Transgenic Res.2014,23 (1):89- 97.) end is glued with Xho I digestions and filling-in, Sfat1 expression frames is inserted into it, the sequence of acquisition is correctly recombinated into load Body is named as pLoxP-Sfat1-neo carriers.The ROSA26 genes of sgRNA targetings are expanded from pig genome with Q5 high-fidelities enzyme The sequence of each 1700bp in both sides or so as homology arm, and is separately added into Not I and Hpa I sites at the both ends of left homology arm, The both ends of right homology arm are separately added into Sal I and Kpn I sites, and left and right homology arm is inserted into pLoxp-Sfat1-neo successively carries The correct recombinant vector of obtained sequence is named as pLoxP-Sfat1 (structure diagram is shown in Fig. 3) by the corresponding site of body, is made For donor template vector.In pLoxP-Sfat1, the sequence such as sequence of the Sfat1 expression frames between left and right homology arm and the two In table shown in SEQ ID NO.9.

Wherein, 1-8 of SEQ ID NO.9 are the identification sequence of Not I, and 9-998 are left homology arm sequence, the The 998-1003 identification sequences for Hpa I, the 1400-2641 sequences for CAG promoters, 2744-3943 are The gene order of Sfat1, the 4030-4442 sequences for rabbit β-globulin polyA, 4504-4538 are loxP's Sequence, 4564-5070 are PGK promoter sequences, and 5081-5884 are neo gene orders, and 6375-6408 are The sequence of loxP, 6414-6419 for Sal I identify sequence, 6420-7970 be right homology arm sequence, 7987- 7970 be the identification sequence of Not I.

Shown in the gene order coding SEQ ID NO.10 of Sfat1 shown in 2744-3943 of SEQ ID NO.9 Sfat1 protein.

It is utilized respectively different restriction enzymes and digestion identification is carried out to pLoxP-Sfat1, the results are shown in Figure 4, knot The correct recombinant vector pLoxP-Sfat1 that fruit shows.

2nd, the screening and identification of ROSA26 sites site-directed integration Sfat1 gene single cell clones

After porcine fetus fibroblasts grow into degree of converging >=80%, cell dissociation is got off with trypsase and carries out essence It really counts, 1 000r/min centrifugation 5min remove supernatant after centrifugation, and wash 1 time with D-PBS resuspension cells centrifuges again, as possible will Supernatant removal is clean, is then mixed with the Lonza transfection liquids of 8 μ g carriers in advance (in the transfection liquid with 100 μ L of 37 DEG C of incubations The molar ratio of pCRISPR/Cas9-ROSA-sg2 and pLoxP-Sfat1 is 1：3) it is resuspended 1 × 10⁶A cell, after abundant mixing, It is transferred in electric shock cup, using Nucleofector^TMConsideration convey instrument shocks by electricity, and electric shock program is T016, after electric shock terminates, by cell It is seeded in 60mm Tissue Culture Dish, is cultivated 48 hours, gone to containing 400 μ g/ml with the DMEM containing 20% fetal calf serum Cultivated 48 hours in the DMEM of G418 and 20% fetal calf serum, then shift to containing 400 μ g/ml G418 and 2 μM of Ganciclovir and Culture to cell clone point occurs in the DMEM of 20% fetal calf serum.

Clone's point is marked with marking pen, and after D-PBS is washed 1 time, stainless steel clone's ring of sterilizing is positioned over clone's point On, it adds in 1 drop trypsin digestion 3 minutes, full culture medium is added in after the completion of digestion and terminates digestion, the liquid in ring will be cloned (containing postdigestive cell) is sucked out, and is transferred to 48 porocyte culture plates and is cultivated, and cell takes half for identifying after covering with, remain Remaining cell cryopreservation.

Cell genomic dna is extracted, carries out PCR detections.Utilize (5 ' the GCATATCGTTTGTTACGCTGGAAG of primer pair 2 3 ' and 5 ' GGAAAGTCCCATAAGGTCATGTAC 3 ') identify whether 5 ' ends occur homologous recombination, correct homologous recombination can expand To the DNA fragmentation that size is 1381bp；Utilize (5 ' the CAGCCTCTGTTCCACATACACTTC 3 ' and 5 ' of primer pair 3 AGCCATACTTCCAAGGCTCAACAG 3 ') identify whether 3 ' ends occur homologous recombination, correct homologous recombination can be expanded to size DNA fragmentation for 1719bp；Utilize (5 ' the GTGCTGGTTATTGTGCTGTCTCATC 3 ' and 5 ' of primer pair 4 GCGTGGTGAAGTTTGTGACTCTTTTG3 ') identify whether Sfat1 genes are integrated into cellular genome, correct homologous recombination It can DNA fragmentation of the amplification to size for 530bp.

Choose the positive colony cell that correct homologous recombination occurs, thaw into 48 orifice plates, it is normal to cultivate, treat cell grow to When converging rate up to 80%, handled 48 hours with Cre adenovirus.Pancreatin digestion centrifugation, collects cell, a part of cell extraction cell Genomic DNA, remaining cell add in micromanipulation liquid, and 1h is placed at room temperature for after resuspension and then goes to 4 DEG C spare (4 DEG C of storages is not Preferably more than 2h).Then (5 ' the AGCTGTCCCTCTTCTCTTATGGAG 3 ' and 5 ' of primer pair 5 are utilized AGCCATACTTCCAAGGCTCAACAG 3 ') and (5 ' CAGCCTCTGTTCCACATACACTTC3 ' and 5 ' of primer pair 6 AGCCATACTTCCAAGGCTCAACAG 3 ') whether PCR identification Neo genes be deleted, and Neo genes are not deleted primer pair 5 energy Amplification obtains the DNA fragmentation that size is 1723bp, and primer pair 6, which can expand, obtains the DNA fragmentation that size is 3653bp, Neo genes After deletion, primer pair 5 cannot be expanded to DNA fragmentation, and primer pair 6, which can expand, obtains the DNA fragmentation that size is 1693bp.Neo bases Because of deleted cell as nuclear donor cell for nuclear transfer.Fig. 5.

3rd, ROSA26 gene locis turn structure and the identification of Sfat-1 gene pigs

With the syringe with 12# syringe needles, draw and physically well develop on pig (kind of a pig farm is stabilized in Beijing) ovary, be of moderate size (3 ~6mm) ovarian follicle in liquid, inject 50mL centrifuge tubes in.Supernatant is abandoned after 37 DEG C of natural sedimentations, egg liquid is washed twice.It is stereoscopic Picking cytoplasm is fine and close under microscope, ovarian cumulus wraps up 3 layers or more of egg mother cell.After cleaning 3 times with DMEM, it is transferred in 38 DEG C of trainings (IVM1 culture solutions are the pFF, 10IU/mL into NSCU23 culture solutions by 10% to the IVM1 culture solutions of incubation 4h in foster case The culture solution that the hCG concentration addition respective substance of PMSG, 10ng/mL EGF and 10IU/mL obtain, wherein abundant mixing, NCSU- The formula of 23 culture solutions is:3.178g NaCl, 1.053g NaHCO are sequentially added in 300mL Milli-Q ultra-pure waters₃, 0.178g KC1,0.081g KH₂PO₄, 0.147g MgSO₄·7H₂O, 0.125g CaCl₂·2H₂O, 0.500g D- Glucose, 0.073g Glutamine, 0.438g Taurine, 0.273g Hypotaurine, 0.025g streptomysin, 0.033g penicillin powder between pH value is adjusted to 7.2~7.4, is finally settled to 500mL, oozing after constant volume with ultra-pure water Pressure is 295~310mOsm thoroughly.After carrying out aseptic filtration with 0.22 μm of filter of Millipore companies SVGP01050 types, it is stored in 4 DEG C) in, after the maturation in vitro for carrying out 20h, egg mother cell is transferred to ripe liquid IVM2 (the ripe liquid IVM2 of no PMSG and hCG Add the obtained culture solution of respective substance for pFF the and 10ng/mL EGF into NSCU23 culture solutions by 10%) in continue to train It supports, carries out maturation in vitro.By maturation in vitro 40 hours or so accumulative, egg mother cell is gone to saturating containing a concentration of 1mg/ml In the culture dish of the DMEM of bright matter acid enzyme, with the pipettor of 200 μ L under the microscope with piping and druming egg mother cell, treat that cumulus cell is complete After coming off entirely, solid glass needle is used under Stereo microscope, by egg membrane form is complete, perivitelline size is suitable and has first polar body The mature oocyte of discharge is put into spare in micromanipulation liquid.

Ripe egg mother cell is sucked with holding ovum needle under the microscope, then egg mother cell is stirred with injection needle, by ovum Ripe first polar body is adjusted to the position at 1 o'clock of clock on mother cell；First polar body is drawn in first polar body with injection needle The cytoplasm of 10%~20% adjacent egg mother cell of side removes ovocyte karyon；20 μm or so of diameter is selected, circle The nuclear donor cell that shape, smooth step two obtain, is put into perivitelline, and oolemma is pressed with injection needle, make donorcells with by The after birth contact of body ovum is closely to get to reconstructed eggs；It is (aobvious containing BSA that reconstructed eggs are added to the micromanipulation liquid containing BSA The preparation method of microoperation liquid is as follows：0.770g NaCl, 0.0356g NaHCO₃, 0.0296g MgSO₄-7H₂O, 0.0162g KCl, 0.0296g KH₂PO₄, 0.0146g L-Glutamines, 0.1g glucose is dissolved in 60 milliliters of ultra-pure waters, abundant mixing After dissolving, 0.238g HEPES, 0.150g taurines, 0.0065g penicillin, 0.4g bovine serum albumin(BSA)s, 0.005g sulphur are added Adjustment pH divides in 7.2-7.4 ranges, constant volume in 100 milliliters of volumetric flasks, 0.22 μm of filter degerming after sour streptomysin, fully dissolving Dress, be placed in 4 DEG C of preservation) in recovery 5 minutes；Then with fusion/activation liquid, (solvent of fusion/activation liquid is water, solute and its dense Degree is respectively 0.1mmol/L MgCl₂, 0.28mol/L mannitol, 0.5mmol/L HEPES, 0.1mmol/L CaCl₂And 0.01% (mass percent concentration) PVA) reconstruct egg white is washed three times, then reconstructed eggs are transferred to fusion/activation liquid in batches In, it washs 3 times, each a small amount of being put into has been paved in the 1mm integration slots of fusion liquid, will be thin in reconstructed eggs with solid glass needle Born of the same parents are vertical with integration slot, then apply the electric pulse induced fusion of one 100 μ s, 140V with BLS cell fusion apparatus, adopt later The chemical Assisted Activations of 4h or so are carried out with the CHX of 7.5 μ g/ml, obtain replacing with the core of pig egg cell the nuclear donor of step 2 The reconstruct cell of the core of cell.

The reconstruct cell of acquisition is cultivated in vitro, selected after 12h Successful development to 1-2 cell stages and form it is good Good reconstructed embryo carries out embryo transfer.The receptor of embryo transfer for the large white sow of the puberty of spontaneous estrus, (stabilize kind by Beijing Pig farm).The method of embryo transfer is to be pulled out the ovary of receptor sow by modus operandi, checks the heat condition of receptor sow, It is preferable with follicular development, and the sow that will be ovulated is transplanted for receptor.Fallopian tubal is gently pulled out, embryo is injected into defeated ovum The deep of pipe, every receptor sow transplant 200 pieces or so of reconstructed embryo.6 receptor sows, embryo transfer 30 days are transplanted altogether Afterwards, using ultrasonic wave gestation detector detection receptor pig pregnancy situation, confirm receptor pig successful pregnancies.

Receptor sow is given a birth transgene clone pig by the way of spontaneous labor.Be born it is latter week within sampling birth piggy Ear tissue carry out transgene pig PCR identification.Whether homologous recombination occurs using 5 ' end of the identification of primer pair 2；Utilize primer pair 3 Whether 3 ' end of identification occurs homologous recombination；Identify whether Sfat1 genes are successfully integrated into genome using primer pair 4.It utilizes The porcine fetus fibroblasts genomic DNA of untransfected utilizes positive porcine fetus fibroblasts genome as negative control DNA is as positive control.

The qualification result of negative pig and positive pig is as shown in Figure 6.The result shows that it is successfully obtained using the method for the present invention ROSA26 gene knock-out pigs.

<110>Military medical research institute of PLA Academy of Military Sciences

<120>Prepare ROSA26 gene mutations and the method rich in unrighted acid animal

<160> 10

<170> PatentIn version 3.5

<210> 1

<211> 19

<212> DNA

<213>Artificial sequence

<220>

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<400> 1

ggaggcgatg acgagatcg 19

<210> 2

<211> 20

<212> DNA

<213>Artificial sequence

<220>

<223>

<400> 2

gctccttctc gattatgggc 20

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<211> 19

<212> DNA

<213>Artificial sequence

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<400> 3

ggcgatgacg agatcgcgg 19

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<211> 19

<212> DNA

<213>Artificial sequence

<220>

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<400> 4

gatgacgaga tcgcggggg 19

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<211> 20

<212> DNA

<213>Artificial sequence

<220>

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<400> 5

gaggcgatga cgagatcgcg 20

<210> 6

<211> 19

<212> DNA

<213>Artificial sequence

<220>

<223>

<400> 6

gggattgagc aggtgtacg 19

<210> 7

<211> 20

<212> DNA

<213>Artificial sequence

<220>

<223>

<400> 7

gaaggagcaa actgacatgg 20

<210> 8

<211> 19

<212> DNA

<213>Artificial sequence

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<223>

<400> 8

gctccttctc gattatggg 19

<210> 9

<211> 7972

<212> DNA

<213>Artificial sequence

<220>

<223>

<400> 9

gcggccgcga ggcaggcggg agtgcggccc gccctgcggc aaccggaggg ggagggagaa 60

gggagcggaa aagcctggaa tacggacgga gccattgctc ccgcagaggg aggagcgctt 120

cctgctcttc tcttgtcact gattggccgc ttctcctccc gccgtgtgtg aaaacacaaa 180

tggcgtgttt tggttggagt aaagctcctg tcagttacag cctcgggagt gcgcagcctc 240

ccaggaactc tcgcattgcc ccctgggtgg gtaggtaggt ggggtggaga gagctgcaca 300

ggagggcgct gtcggcctcc tgcgggggga ggggagggtc agtgaaagtg gctcccgcgc 360

gggcgtcctg ccaccctccc ctccggggga gtcggtttac ccgccgcctg ctcggctttg 420

gtatctgatt ggctgctgaa gtcctgggaa cggccccttg ttattggctt gggtcccaaa 480

tgagcgaaac cactacgcga gtcggcaggg aggcggtctt tggtacggcc ctccccgagg 540

ccagcgccgc agtgtctggc ccctcgcccc tgcgcaacgt ggcaggaagc gcgcgcagga 600

ggcgggggcg ggctgccggg ccgaggcttc tgggtggtgg tgactgcggc tccgccctgg 660

gcgtccgccg cctgaaggac gagactagct ctacctgctc tcggacccgt gggggtgggg 720

ggtggaggaa ggagtggggg gtcggtcctg ctggcttgtg ggtgggaggc gcatgttctc 780

caaaaacccg cgcgagctgc aatcctgagg gagctgcagt ggaggaggcg gagagaaggc 840

cgcacccttc tccgcagggg gaggggagtg ccgcaatacc tttatgggag ttctctgctg 900

cctccttttc ctaaggaccg ccctgggcct agaaaaatcc ctccctcccc cgcgatctcg 960

tcatcgcctc catgtcagtt tgctccttct cgattatgtt aacctactcg atcgacattg 1020

attattgact agttattaat agtaatcaat tacggggtca ttagttcata gcccatatat 1080

ggagttccgc gttacataac ttacggtaaa tggcccgcct ggctgaccgc ccaacgaccc 1140

ccgcccattg acgtcaataa tgacgtatgt tcccatagta acgccaatag ggactttcca 1200

ttgacgtcaa tgggtggagt atttacggta aactgcccac ttggcagtac atcaagtgta 1260

tcatatgcca agtacgcccc ctattgacgt caatgacggt aaatggcccg cctggcatta 1320

tgcccagtac atgaccttat gggactttcc tacttggcag tacatctacg tattagtcat 1380

cgctattacc atggtcgagg tgagccccac gttctgcttc actctcccca tctccccccc 1440

ctccccaccc ccaattttgt atttatttat tttttaatta ttttgtgcag cgatgggggc 1500

gggggggggg ggggggcgcg cgccaggcgg ggcggggcgg ggcgaggggc ggggcggggc 1560

gaggcggaga ggtgcggcgg cagccaatca gagcggcgcg ctccgaaagt ttccttttat 1620

ggcgaggcgg cggcggcggc ggccctataa aaagcgaagc gcgcggcggg cgggagtcgc 1680

tgcgcgctgc cttcgccccg tgccccgctc cgccgccgcc tcgcgccgcc cgccccggct 1740

ctgactgacc gcgttactcc cacaggtgag cgggcgggac ggcccttctc ctccgggctg 1800

taattagcgc ttggtttaat gacggcttgt ttcttttctg tggctgcgtg aaagccttga 1860

ggggctccgg gagggccctt tgtgcggggg gagcggctcg gggggtgcgt gcgtgtgtgt 1920

gtgcgtgggg agcgccgcgt gcggctccgc gctgcccggc ggctgtgagc gctgcgggcg 1980

cggcgcgggg ctttgtgcgc tccgcagtgt gcgcgagggg agcgcggccg ggggcggtgc 2040

cccgcggtgc ggggggggct gcgaggggaa caaaggctgc gtgcggggtg tgtgcgtggg 2100

ggggtgagca gggggtgtgg gcgcgtcggt cgggctgcaa ccccccctgc acccccctcc 2160

ccgagttgct gagcacggcc cggcttcggg tgcggggctc cgtacggggc gtggcgcggg 2220

gctcgccgtg ccgggcgggg ggtggcggca ggtgggggtg ccgggcgggg cggggccgcc 2280

tcgggccggg gagggctcgg gggaggggcg cggcggcccc cggagcgccg gcggctgtcg 2340

aggcgcggcg agccgcagcc attgcctttt atggtaatcg tgcgagaggg cgcagggact 2400

tcctttgtcc caaatctgtg cggagccgaa atctgggagg cgccgccgca ccccctctag 2460

cgggcgcggg gcgaagcggt gcggcgccgg caggaaggaa atgggcgggg agggccttcg 2520

tgcgtcgccg cgccgccgtc cccttctccc tctccagcct cggggctgtc cgcgggggga 2580

cggctgcctt cgggggggac ggggcagggc ggggttcggc ttctggcgtg tgaccggcgg 2640

ctctagagcc tctgctaacc atgttcatgc cttcttcttt ttcctacagc tcctgggcaa 2700

cgtgctggtt attgtgctgt ctcatcattt tggcaaagaa ttcatggtcg ctcattcctc 2760

agacgggtta tccgccacgg ctccggtcac cggcggagat gttctggttg atgctcgcgt 2820

ttctattgaa gagaagccac cacgctcctt ggattcaact caacagtcta ctgaggagga 2880

gcgcgttcaa ttgccaactg tggatgcatt ccgtcgtgcc attccacccc attgcttcga 2940

acgcgatctc accagatctc tcagatattt ggtgcaagac tttgcggccc ttgcttttct 3000

ttactttgct cttcctgtct tcgaatactt tggacttgtc ggttatctgg catggaacgt 3060

attgatggga gtcttcggat tcgctttgtt tgttgtcgga cacgattgtc ttcatggatc 3120

attctcagat aatcaagttt tgaacgatat tattggacac atcgcattct ctcctctttt 3180

ctctccctat ttcccatggc aaaagagtca caaacttcac cacgctttca ccaaccatat 3240

tgacaaagat cacggacacg tttggattca agacaaagac tatgaaaaga tgccaacatg 3300

gaagaagctg ttcaatccaa tgccgttctc gggatggctc aaatggttcc ccgtttacac 3360

actgttcgga ttctgcgatg gatctcattt ctggccatac tcttctcttt tcgtccgtga 3420

ttctgagcgt gttcaatgcg tgatttctgc cacttgctgt gtcgcttgtg cctatgttgc 3480

tctcgcgatt gctggatcct attcaaactg gttctggtac tactgggttc cactttcctt 3540

ctttggatgc atgctcgtta ttgtcaccta tcttcaacac gctgatgaag ttgctgaggt 3600

ttacgaagct gatgagtgga gtttcgtgcg tggacaaacc cagactatcg atcgtttcta 3660

tggatttgga ttggatgaga ccatgcatca catcactgac ggacacgttg cccatcattt 3720

cttcaataag attccacatt accatctgat cgaagctact gaaggtgtga agaaggtttt 3780

ggagccactg ttcgagactc agtacggata caagtaccaa gtaaattacg acttcttcgt 3840

ccgcttccta tggttcaaca tcaagctcga ctatcttgtc cataagacta aaggaatcct 3900

tcaattccga acaactcttg aggagaaggc aaaagccaag taagagctca attcactcct 3960

caggtgcagg ctgcctatca gaaggtggtg gctggtgtgg ccaatgccct ggctcacaaa 4020

taccactgag atctttttcc ctctgccaaa aattatgggg acatcatgaa gccccttgag 4080

catctgactt ctggctaata aaggaaattt attttcattg caatagtgtg ttggaatttt 4140

ttgtgtctct cactcggaag gacatatggg agggcaaatc atttaaaaca tcagaatgag 4200

tatttggttt agagtttggc aacatatgcc catatgctgg ctgccatgaa caaaggttgg 4260

ctataaagag gtcatcagta tatgaaacag ccccctgctg tccattcctt attccataga 4320

aaagccttga cttgaggtta gatttttttt atattttgtt ttgtgttatt tttttcttta 4380

acatccctaa aattttcctt acatgtttta ctagccagat ttttcctcct ctcctgacta 4440

ctcccagtca tagctgtccc tcttctctta tggagatccc tcgacctgca gcccaagctt 4500

cgagataact tcgtataatg tatgctatac gaagttatgt cgagggcccc tgcaggtcaa 4560

ttctaccggg taggggaggc gcttttccca aggcagtctg gagcatgcgc tttagcagcc 4620

ccgctgggca cttggcgcta cacaagtggc ctctggcctc gcacacattc cacatccacc 4680

ggtaggcgcc aaccggctcc gttctttggt ggccccttcg cgccaccttc tactcctccc 4740

ctagtcagga agttcccccc cgccccgcag ctcgcgtcgt gcaggacgtg acaaatggaa 4800

gtagcacgtc tcactagtct cgtgcagatg gacagcaccg ctgagcaatg gaagcgggta 4860

ggcctttggg gcagcggcca atagcagctt tgctccttcg ctttctgggc tcagaggctg 4920

ggaaggggtg ggtccggggg cgggctcagg ggcgggctca ggggcggggc gggcgcccga 4980

aggtcctccg gaggcccggc attctgcacg cttcaaaagc gcacgtctgc cgcgctgttc 5040

tcctcttcct catctccggg cctttcgacc tgcagccaat atgggatcgg ccattgaaca 5100

agatggattg cacgcaggtt ctccggccgc ttgggtggag aggctattcg gctatgactg 5160

ggcacaacag acaatcggct gctctgatgc cgccgtgttc cggctgtcag cgcaggggcg 5220

cccggttctt tttgtcaaga ccgacctgtc cggtgccctg aatgaactgc aggacgaggc 5280

agcgcggcta tcgtggctgg ccacgacggg cgttccttgc gcagctgtgc tcgacgttgt 5340

cactgaagcg ggaagggact ggctgctatt gggcgaagtg ccggggcagg atctcctgtc 5400

atctcacctt gctcctgccg agaaagtatc catcatggct gatgcaatgc ggcggctgca 5460

tacgcttgat ccggctacct gcccattcga ccaccaagcg aaacatcgca tcgagcgagc 5520

acgtactcgg atggaagccg gtcttgtcga tcaggatgat ctggacgaag agcatcaggg 5580

gctcgcgcca gccgaactgt tcgccaggct caaggcgcgc atgcccgacg gcgatgatct 5640

cgtcgtgacc catggcgatg cctgcttgcc gaatatcatg gtggaaaatg gccgcttttc 5700

tggattcatc gactgtggcc ggctgggtgt ggcggaccgc tatcaggaca tagcgttggc 5760

tacccgtgat attgctgaag agcttggcgg cgaatgggct gaccgcttcc tcgtgcttta 5820

cggtatcgcc gctcccgatt cgcagcgcat cgccttctat cgccttcttg acgagttctt 5880

ctgaggggat cgatccgctg taagtctgca gaaattgatg atctattaaa caataaagat 5940

gtccactaaa atggaagttt ttcctgtcat actttgttaa gaagggtgag aacagagtac 6000

ctacattttg aatggaagga ttggagctac gggggtgggg gtggggtggg attagataaa 6060

tgcctgctct ttactgaagg ctctttacta ttgctttatg ataatgtttc atagttggat 6120

atcataattt aaacaagcaa aaccaaatta agggccagct cattcctccc actcatgatc 6180

tatagatcta tagatctctc gtgggatcat tgtttttctc ttgattccca ctttgtggtt 6240

ctaagtactg tggtttccaa atgtgtcagt ttcatagcct gaagaacgag atcagcagcc 6300

tctgttccac atacacttca ttctcagtat tgttttgcca agttctaatt ccatcagaag 6360

ctgactctag caatataact tcgtataatg tatgctatac gaagttatct agagtcgacg 6420

ggcgggattc ttttgccctg gcttaacctg attcttgggc gttgtcctgc aggggattga 6480

gcaggtgtac gaggacgagc ccaatttctc tatattccca cagtcttgag tttgtgtcac 6540

aaaataatta tagtggggtg gagatgggaa atgagtccag gcaacaccta agcctgattt 6600

tatgcattga gactgcgtgt tattactaaa gatctttgtg tcgcaatttc ctgatgaagg 6660

gagataggtt aaaaagcacg gatctactga gttttacagt catcccattt gtagactttt 6720

gctacaccac caaagtatag catctgagat taaatattaa tctccaaacc ttaggccccc 6780

tcacttgcat ccttacggtc agataactct cactcatact ttaagcccat tttgtttgtt 6840

gtacttgctc atccagtccc agacatagca ttggctttct cctcacctgt tttaggtagc 6900

cagcaagtca tgaaatcaga taagttccac caccaattaa cactacccat cttgagcata 6960

ggcccaacag tgcatttatt cctcatttac tgatgttcgt gaatatttac cttgattttc 7020

atttttttct ttttcttaag ctgggatttt actcctgacc ctattcacag tcagatgatc 7080

ttgactacca ctgcgattgg acctgaggtt cagcaatact cccctttatg tcttttgaat 7140

acttttcaat aaatctgttt gtattttcat tagttagtaa ctgagctcag ttgccgtaat 7200

gctaatagct tccaaactag tgtctctgtc tccagtatct gataaatctt aggtgttgct 7260

gggacagttg tcctaaaatt aagataaagc atgaaaataa ctgacacaac tccattactg 7320

gctcctaact acttaaacaa tgcattctat cttcacaaat gtgaaaaagg agttccctca 7380

gtggactaac cttatctttt ctcaacacct ttttctttgc acaattttcc acacatgcct 7440

acaaaaagta cttttctgct caagtcacac tgagttgatt gctatttacc aaaatcaaag 7500

taacattatc agatctctgt agggtggttc cctctggaat gctaccctcc atagtcctta 7560

cccttcaagt aaagagcatg aagactgaaa tatctcctct gtgatctgtc atcctttaag 7620

ccagaatccc ccataaaaaa gttagtattg ctttctcctg atcccatagc aggttgaatc 7680

atagcactta tcaggttgtt gtcattgctt gcttaaattc tcctaactat ttggagcttc 7740

ttgagggcac aggttcttgt tgagtcttgt acctaagcac ctagtatagt ccttgatgtc 7800

tagccaaccc taaataaaat gcagtgagtg acatgtagat gtctttataa ggtttgatag 7860

gttggtctct caaatagttc ttttgtatgt ttggtagtgc tctagattag cactggccag 7920

tataactctg atgatggaaa tgttctatag ctatgctgtc taatatggta cc 7972

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<211> 399

<212> PRT

<213>Artificial sequence

<220>

<223>

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Met Val Ala His Ser Ser Asp Gly Leu Ser Ala Thr Ala Pro Val Thr

1 5 10 15

Gly Gly Asp Val Leu Val Asp Ala Arg Val Ser Ile Glu Glu Lys Pro

20 25 30

Pro Arg Ser Leu Asp Ser Thr Gln Gln Ser Thr Glu Glu Glu Arg Val

35 40 45

Gln Leu Pro Thr Val Asp Ala Phe Arg Arg Ala Ile Pro Pro His Cys

50 55 60

Phe Glu Arg Asp Leu Thr Arg Ser Leu Arg Tyr Leu Val Gln Asp Phe

65 70 75 80

Ala Ala Leu Ala Phe Leu Tyr Phe Ala Leu Pro Val Phe Glu Tyr Phe

85 90 95

Gly Leu Val Gly Tyr Leu Ala Trp Asn Val Leu Met Gly Val Phe Gly

100 105 110

Phe Ala Leu Phe Val Val Gly His Asp Cys Leu His Gly Ser Phe Ser

115 120 125

Asp Asn Gln Val Leu Asn Asp Ile Ile Gly His Ile Ala Phe Ser Pro

130 135 140

Leu Phe Ser Pro Tyr Phe Pro Trp Gln Lys Ser His Lys Leu His His

145 150 155 160

Ala Phe Thr Asn His Ile Asp Lys Asp His Gly His Val Trp Ile Gln

165 170 175

Asp Lys Asp Tyr Glu Lys Met Pro Thr Trp Lys Lys Leu Phe Asn Pro

180 185 190

Met Pro Phe Ser Gly Trp Leu Lys Trp Phe Pro Val Tyr Thr Leu Phe

195 200 205

Gly Phe Cys Asp Gly Ser His Phe Trp Pro Tyr Ser Ser Leu Phe Val

210 215 220

Arg Asp Ser Glu Arg Val Gln Cys Val Ile Ser Ala Thr Cys Cys Val

225 230 235 240

Ala Cys Ala Tyr Val Ala Leu Ala Ile Ala Gly Ser Tyr Ser Asn Trp

245 250 255

Phe Trp Tyr Tyr Trp Val Pro Leu Ser Phe Phe Gly Cys Met Leu Val

260 265 270

Ile Val Thr Tyr Leu Gln His Ala Asp Glu Val Ala Glu Val Tyr Glu

275 280 285

Ala Asp Glu Trp Ser Phe Val Arg Gly Gln Thr Gln Thr Ile Asp Arg

290 295 300

Phe Tyr Gly Phe Gly Leu Asp Glu Thr Met His His Ile Thr Asp Gly

305 310 315 320

His Val Ala His His Phe Phe Asn Lys Ile Pro His Tyr His Leu Ile

325 330 335

Glu Ala Thr Glu Gly Val Lys Lys Val Leu Glu Pro Leu Phe Glu Thr

340 345 350

Gln Tyr Gly Tyr Lys Tyr Gln Val Asn Tyr Asp Phe Phe Val Arg Phe

355 360 365

Leu Trp Phe Asn Ile Lys Leu Asp Tyr Leu Val His Lys Thr Lys Gly

370 375 380

Ile Leu Gln Phe Arg Thr Thr Leu Glu Glu Lys Ala Lys Ala Lys

385 390 395

Claims (10)

1. it is mutated the method for ROSA26 genes, it is characterised in that：The method is carried out using CRISPR/Cas9 systems, described CRISPR/Cas9 systems include the sgRNA of targeting ROSA26 genes, and the target sequence of the sgRNA is following A1), A2) or A3)：

A1) in sequence table sequence 2 nucleotide sequence；

A2 the DNA sequence dna) and A1) limited have 75% or more than 75% homogeneity as A1) derived from DNA sequence dna；

A3) under strict conditions with A1) limit DNA sequence dna hybridize as A1) derived from DNA sequence dna.

2. according to the method described in claim 1, it is characterized in that：Described in being imported into recipient cell SgRNA and Cas9 realizes the mutation of ROSA26 genes.

3. according to the method described in claim 2, it is characterized in that：It is described that the sgRNA and Cas9 is imported into recipient cell Described in being imported by the expression vector of the expression vector of the encoding gene that will contain the sgRNA and the encoding gene containing Cas9 It is realized in recipient cell.

4. according to the method described in claim 3, it is characterized in that：The expression of the encoding gene containing the sgRNA carries The expression vector of body and the encoding gene containing Cas9 is same carrier, which is named as carrier 1, the carrier 1 is the recombinant vector obtained by DNA fragmentations of the BsmB I into CRISPR/Cas9 carriers shown in insetion sequence 2, the carrier 1 can express sgRNA and Cas9 described in claim 1.

5. according to the method any in claim 2-4, it is characterised in that：The method is further included to the recipient cell Middle importing donor dna realizes the mutation of ROSA26 genes, and the donor dna, which contains, is located at the target sequence in ROSA26 genes Two DNA fragmentations of upstream and downstream.

6. according to the method described in claim 5, it is characterized in that：The donor dna also containing Sfat1 encoding genes or The expression cassette of Sfat1 encoding genes.

Any one of 7. following 1) -6)：

1) method for preparing ROSA26 Genetic Mutant Cells, including：It is prepared into using the method any in claim 1-6 To the cell of ROSA26 gene mutations；

2) method for preparing ROSA26 gene mutant animals, including：It is prepared using the method any in claim 1-6 The zooblast of ROSA26 gene mutations prepares ROSA26 gene mutations using the zooblast of the ROSA26 gene mutations and moves Object；

3) method for preparing expression Sfat1 cells, including：ROSA26 genes are prepared using the method described in claim 6 to dash forward The zooblast of change obtains the cell of expression Sfat1；

4) method for preparing expression Sfat1 animals, including：ROSA26 genes are prepared using the method described in claim 6 to dash forward The zooblast of change obtains the cell of expression Sfat1；The animal of expression Sfat1 is prepared using the cell of the expression Sfat1；

5) method rich in unrighted acid cell is prepared, including：ROSA26 is prepared using the method described in claim 6 The zooblast of gene mutation obtains the cell rich in unrighted acid；

6) method rich in unrighted acid animal is prepared, including：ROSA26 is prepared using the method described in claim 6 The zooblast of gene mutation obtains the cell of expression Sfat1；It is prepared using the cell of the expression Sfat1 rich in unsaturation The animal of aliphatic acid.

8. according to the method any in claim 1-7, it is characterised in that：The cell be following a1) a2) or a3)：

A1) zooblast；

A2) mammalian cell；

A3) pig cell；

The animal is b1) or b2)：

B1) mammal；

A2) pig.

9. the cell or described that the method for ROSA26 Genetic Mutant Cells obtains is prepared described in 7 or 8 the method for claim The cell or the method for the preparation rich in unrighted acid cell that the method for preparing expression Sfat1 cells obtains obtain thin Born of the same parents.

10. application of any the method in animal breeding in claim 1-9.